document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=271575>Question 271575</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A steamboat went 8 miles upstream in 1 hour.  The return trip took only 30 minutes.  Assume that the speed of the current and the direction were constant during both parts of the trip.  Find the speed of the boat in still water and the speed of the current.\r<BR>\n" );
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document.write( "Please help me figure out what 2 equations I would use and then I believe I can get the answer.\r<BR>\n" );
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document.write( "Thanks in advance for your help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #198794 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=198794\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A steamboat went 8 miles upstream in 1 hour. <BR>\n" );
document.write( "The return trip took only 30 minutes. <BR>\n" );
document.write( "Assume that the speed of the current and the direction were constant during both parts of the trip. <BR>\n" );
document.write( "Find the speed of the boat in still water and the speed of the current. <BR>\n" );
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document.write( "Upstream DATA:<BR>\n" );
document.write( "distance = 8 miles ; time = 1 hr. ; rate = d/t = 8 mph<BR>\n" );
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document.write( "Downstream DATA:<BR>\n" );
document.write( "distance = 8 miles ; time = 1/2 hr. ; rate = d/t = 16 mph<BR>\n" );
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document.write( "Equations:<BR>\n" );
document.write( "boat - current = 8 mph<BR>\n" );
document.write( "boat + current = 16 mph<BR>\n" );
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document.write( "2*boat = 24 mph<BR>\n" );
document.write( "boat = 12 mph (rate in still water)<BR>\n" );
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document.write( "Substitute into b + c = 16 to solve for current speed<BR>\n" );
document.write( "12 + c = 16<BR>\n" );
document.write( "c = 4 mph (current speed)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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